I noticed that my sieve rules are taking a very long time when archiving 
messages. I can see on my logs that every message takes about two-three seconds 
to be evaluated. 

My sieve for the Archive is this:

cat /var/mail/vmail/mail/sieve/global/report-ham.sieve
require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"];

if environment :matches "imap.mailbox" "*" {
  set "mailbox" "${1}";
}

if string "${mailbox}" "Trash" {
  stop;
}

if environment :matches "imap.user" "*" {
  set "username" "${1}";
}

pipe :copy "sa-learn-ham.sh" [ "${username}" ];

And my sa-learn-ham.sh is this:

#!/bin/sh
export PATH="/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin:$PATH"
exec /usr/bin/sa-learn -u ${1} —ham




May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
multi-script: Start execute sequence
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
Executing script from `/var/mail/vmail/mail/sieve/global/report-ham.svbin'
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
multi-script: Run script `/var/mail/vmail/mail/sieve/global/report-ham.svbin'
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
Started running script `/var/mail/vmail/mail/sieve/global/report-ham.svbin'
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
Finished running script `ok' 
(status=/var/mail/vmail/mail/sieve/global/report-ham.svbin, resource usage: no 
usage recorded)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
multi-script: Execute result
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing result (status=ok, commit=no)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Starting execution of actions
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing actions
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing pipe action
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
action pipe: running program: sa-learn-ham.sh
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Created
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Pass 
environment: USER=fran...@med-lo.eu
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Pass 
environment: HOME=/var/mail/vmail/med-lo.eu/francis
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Pass 
environment: HOST=fb58607074fd
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: Mailbox 
Archive: UID 191458: Opened mail because: mail stream
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finished executing pipe action (status=ok, keep=implicit)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finished executing actions (status=ok, keep=implicit)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finished executing result (no commit, status=ok, keep=yes)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
multi-script: Sequence active
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
multi-script: Finishing sequence (status=ok)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing result (status=ok, commit=yes)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Starting execution of actions
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing actions
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finished executing actions (status=ok, keep=implicit)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Execute implicit keep (failure=no)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Start storing into mailbox Archive
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Executing implicit keep action
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Execute storing into mailbox 'Archive'
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Updated existing mail in mailbox 'Archive'
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finished executing implicit keep action (status=ok)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finalizing actions
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Finalize pipe action (status=ok, action_status=ok, 
commit_status=ok, pre-commit=yes)
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: sieve: 
uid=191458: Commit pipe action
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Establishing 
connection
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh: Forked child 
process
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh (9354): 
Connected to program
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh (9354): Finished 
streaming payload to program
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh (9354): Finished 
input to program
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh (9354): 
Disconnected
May 09 09:17:10 imap(fran...@med-lo.eu)<9349><4gm6NAAYsagKCige>: Debug: program 
exec:/var/mail/vmail/mail/sieve/global/scripts/sa-learn-ham.sh (9354): Waiting 
for program to finish after 4 msecs (timeout = 9996 msecs)

I also noticed this happens for a few accounts. Do you know what could be 
causing this?

Best,
Francis 
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